package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceImpl implements UserService {

    public static final String WX_LOGIN="https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private WeChatProperties weChatProperties;

    @Autowired
    private UserMapper userMapper;

    public User wechatLogin(UserLoginDTO userLoginDTO){
//        //调用微信接口服务，获得openID
//        Map<String,String> map = new HashMap<>();
//        map.put("appid",weChatProperties.getAppid());
//        map.put("secret",weChatProperties.getSecret());
//        map.put("js_code",userLoginDTO.getCode());
//        map.put("grant_type","authorization_code");
//        String json=HttpClientUtil.doGet(WX_LOGIN,map);
//        //获取并且判断openid
//        JSONObject jsonObject= JSON.parseObject(json);
//        String openid=jsonObject.getString("openid");
        String code=userLoginDTO.getCode();
        String openid=getOpenID(code);

        if(openid==null||openid.isEmpty()){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断用户是否已经存在
        User wechatUser=userMapper.getByOpenID(openid);
        //若不存在就注册，加入user表
        if(wechatUser==null){
            wechatUser=User.builder().createTime(LocalDateTime.now()).openid(openid).build();
            userMapper.insert(wechatUser);
        }
        //返回用户对象(查表)
        return wechatUser;
    }

    private String getOpenID(String code){
        //调用微信接口服务，获得openID
        Map<String,String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        String json=HttpClientUtil.doGet(WX_LOGIN,map);
        //获取并且判断openid
        JSONObject jsonObject= JSON.parseObject(json);
        return jsonObject.getString("openid");
    }
}
